#bg1{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	width: 300px;
	height: 200px;
	border: 1px solid grey;
	background-size: cover;
}

#bg2{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	width: 300px;
	height: 200px;
	border: 1px solid grey;
	background-size: contain;
}

#bg3{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	background-size: 50% 80%;
}

#bg4{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	background-size: 150%;
}

#bg5{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	background-size: 200px 100px;
}

#bg6{
	background: url("http://static.mukewang.com/static/img/logo_index.png") no-repeat;
	background-size: 200px;
}
